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How the single threaded non blocking IO model works in Node.js
...rocessing of multiple requests.
You can think of node's event loop as somewhat similar to the kernel's dispatcher: the kernel would schedule for execution a blocked thread once its pending IO is completed while node will schedule a callback when the corresponding event has occured.
Highly concurre...
MongoDB - Update objects in a document's array (nested updating)
...ame" equal to "my_item_two", it won't get incremented). But this might be what you want.
The second part is trickier. We can push a new item to an array without a "my_item_two" as follows:
db.bar.update( {user_id : 123456, "items.item_name" : {$ne : "my_item_two" }} ,
{$addToS...
iOS 5 Best Practice (Release/retain?)
As a beginning iPhone programmer, what is the best practice for writing apps to be used either with iOS 5 or older versions? Specifically, should I continue using the release/retain of data, or should I ignore that? Does it matter?
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Adding new column to existing DataFrame in Python pandas
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What @joaquin says is true, but as long as you keep that in mind, this is a very useful shortcut.
– VedTopkar
Sep 27 '14 at 2:37
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How to update only one field using Entity Framework?
...st tested this, and in the case I only change a single field of an object, what EF creates is pretty much what you'd create manually, too - something like:
`UPDATE dbo.Users SET Password = @Password WHERE UserId = @UserId`
So EF is smart enough to figure out what columns have indeed changed, and ...
Is std::vector copying the objects with a push_back?
... want to store pointers to objects in your vector, create a std::vector<whatever*> instead of std::vector<whatever>.
However, you need to make sure that the objects referenced by the pointers remain valid while the vector holds a reference to them (smart pointers utilizing the RAII idi...
Why is good UI design so hard for some Developers? [closed]
... a laymen: How on earth could a normal person be so dumb not to understand what the expert understood 10 years ago?
One of the first facts to acknowledge that is unbelievably difficult to grasp for almost all experienced developers is this:
Normal people have a vastly different concept of softwar...
Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools
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But what if you want Compiler 1.7 and still get this error? how can you fix that?
– Shervin Asgari
Nov 14 '13 at 18:59
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How to check whether a Storage item is set?
...ot set on page load and you want to do something with foo. I think that is what the questioner was getting at, you want to check if the key foo exists, not if foo has a value. I have this situation, where a click event triggers .setitem with logic based around getItem,but it won't work until I setIt...
JavaScript/JQuery: $(window).resize how to fire AFTER the resize is completed?
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This is now what I am using,
– Bharat Patil
Feb 11 '14 at 7:16
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